Power Platform Community Forum Thread Details

Previously I was using a sharepoint default form to send a request to my client. I was always able to fill all the fields in default form(fields being appointment type, reason, requested date, due date) and send it to client approval by workflow that was operating after 'Save' and it was working. However when I tried to customize my form using powerapps by adding one dynamic textfield that calculates the difference in the due and requested dates excluding holidays and weekends, my form doesn't save in sharepoint and I get a message like 'There was a problem saving your changes. The data source may be invalid.'

When I checked out the data source, it was all good. Each field especially required fields of my form has been given correct values. I don't understand where I am going wrong.

Is there any way of debugging this? How can I check out the json after the form submits and throws error? Or is my approach wrong?

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Building Power Apps